Class SRP6.SRP6Base

java.lang.Object

br.net.dd.netherwingcore.common.cryptography.authentication.SRP6.SRP6Base

Direct Known Subclasses:

SRP6.SRP6Client

Enclosing class:

SRP6

public static class SRP6.SRP6Base
extends Object

Base class for SRP6 computations. Handles the protocol's mathematical operations with parameters such as prime modulus (N), generator (g), salt, and verifier. Provides methods for private and public values and client evidence verification.

Field Summary

Fields

Modifier and Type	Field	Description
protected boolean	_used
protected final BigInteger	b
protected final BigInteger	B
protected final BigInteger	g
protected final BigInteger	k
protected final BigInteger	N
protected final SRP6.Salt	s
protected final BigInteger	v

Constructor Summary

Constructors

Constructor	Description
SRP6Base(BigInteger i, SRP6.Salt salt, BigInteger verifier, BigInteger N, BigInteger g, BigInteger k)	Constructs an SRP6Base instance with the provided parameters.

Method Summary

Modifier and Type	Method	Description
protected BigInteger	doVerifyClientEvidence(BigInteger A, BigInteger clientM1)
BigInteger	verifyClientEvidence(BigInteger A, BigInteger clientM1)	Verifies the client's evidence (M1) based on the SRP protocol.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

N

protected final BigInteger N

g

protected final BigInteger g

k

protected final BigInteger k

v

protected final BigInteger v

s

protected final SRP6.Salt s

b

protected final BigInteger b

B

protected final BigInteger B

_used

protected boolean _used

Constructor Details

SRP6Base

public SRP6Base(BigInteger i,
 SRP6.Salt salt,
 BigInteger verifier,
 BigInteger N,
 BigInteger g,
 BigInteger k)

Constructs an SRP6Base instance with the provided parameters.

Parameters:

i - An unused initialization parameter (hash of username may be passed here).

salt - The salt used in SRP computation.

verifier - The verifier generated during the registration phase.

N - Prime modulus for SRP computations.

g - Generator for SRP computations.

k - Multiplier parameter.

Method Details

verifyClientEvidence

public BigInteger verifyClientEvidence(BigInteger A,
 BigInteger clientM1)

Verifies the client's evidence (M1) based on the SRP protocol.

Parameters:

A - Public value sent by the client.

clientM1 - Client's proof of knowledge of the shared key.

Returns:

The session key (K) if verification succeeds; null otherwise.

Throws:

IllegalStateException - if the object is reused.

doVerifyClientEvidence

protected BigInteger doVerifyClientEvidence(BigInteger A,
 BigInteger clientM1)